Wind advisories will go up at 3 p.m. today for the first gusty winds in the mountains in the Interstate 5 area, and then escalate to Red Flag levels all across Los Angeles County by 6 a.m. Sunday. Wind gusts of up to 65 miles per hour will blast the local mountains and valleys Sunday, and temperatures in some areas will top 100 degrees, according to the National Weather Service.

The “inside slider” is the meteorological term for a trough of low pressure, followed by a ridge of high pressure, moving in from the Pacific. And another one is poised to make things toasty in the city, and hazardous in the brushfire-prone areas, forecasters said.

“An extended period of very-hot and dry weather with gusty offshore winds is expected through most of next week,” the local NWS office said.

And look for “a big jump” in temperatures, with highs up 10-15 degrees from today to Sunday. And although winds will diminish somewhat on Monday, the forecast is for “sunny, breezy and hot” weather, according to the NWS summary for L.A. County, posted by the NWS office in Oxnard.

Similar warnings were posted for nearly all of San Diego and Orange counties by the NWS office in San Diego.

As of midmorning today, the Los Angeles city Fire Department had not posted Red Flag parking restrictions on narrow roads in the Hollywood Hills.